<template>
  <div class="app-container">
    <el-form ref="user" :model="user" :rules="validateRules" label-width="120px">
      <el-form-item label="用户名" prop="username">
        <el-input v-model="user.username"/>
      </el-form-item>
      <el-form-item label="用户昵称">
        <el-input v-model="user.nickName"/>
      </el-form-item>

      <el-form-item  label="用户密码" prop="password">
        <el-input v-model="user.password"/>
      </el-form-item>


      <el-form-item>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="saveOrUpdate">保存</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>

<script>

  import userApi from '@/api/acl/user'


  const validatePass = (rule, value, callback) => {
    if (value.length < 6) {
      callback(new Error('密码不能小于6位'))
    } else {
      callback()
    }
  }

  export default {
    data() {
      return {
        user: {
          id:'',
          username: '',
          nickName: '',
          password: ''
        },
        saveBtnDisabled: false, // 保存按钮是否禁用,
        validateRules: {
          username: [{ required: true, trigger: 'blur', message: '用户名必须输入' }],
          password: [{ required: true, trigger: 'blur', validator: validatePass }]
        }
      }
    },

    // 监听器
    watch: {
      $route(to, from) {
        console.log('路由变化......')
        console.log(to)
        console.log(from)
        this.init()
      }
    },

    // 生命周期方法（在路由切换，组件不变的情况下不会被调用）
    created() {
      console.log('form created ......')
      this.init()
    },

    methods: {

      // 表单初始化
      init() {
        if (this.$route.params && this.$route.params.id) {
          const id = this.$route.params.id
          this.fetchDataById(id)
          this.user.id = id
        } else {
          // 对象拓展运算符：拷贝对象，而不是赋值对象的引用
          this.user = { ...defaultForm }
        }
      },

      saveOrUpdate() {
        this.$refs.user.validate(valid => {
          if (valid) {
            this.saveBtnDisabled = true // 防止表单重复提交
            if (!this.user.id) {
              this.saveData()
            } else {
              this.updateData()
            }
          }
        })
      },

      // 新增讲师
      saveData() {
        userApi.save(this.user).then(response => {
          // debugger
          if (response.success) {
            this.$message({
              type: 'success',
              message: response.message
            })
            this.$router.push({ path: '/acl/user/list' })
          }
        })
      },

      // 根据id更新记录
      updateData() {
        // teacher数据的获取
        userApi.updateById(this.user).then(response => {
          if (response.success) {
            this.$message({
              type: 'success',
              message: response.message
            })
            this.$router.push({ path: '/acl/user/list' })
          }
        })
      },

      // 根据id查询记录
      fetchDataById(id) {
        userApi.getById(id).then(response => {
          this.user = response.data.user
        })
      }

    }
  }
</script>
